Note 2 - Interim Financial Presentation  | 
9 Months Ended | ||
|---|---|---|---|
Mar. 31, 2018  | |||
| Notes to Financial Statements | |||
| Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] | 
 In our opinion, all adjustments, consisting only of normal recurring adjustments necessary for fair presentation, have been included in the consolidated financial statements. The results of operations for the  
three  and nine  months ended  March 31, 2018  are not  necessarily indicative of results that  may  be expected for the entire fiscal year. The interim consolidated financial statements should be read in conjunction with the consolidated financial statements and accompanying notes included in our Annual Report on Form 10 -K for the year ended  June 30, 2017. 
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